Grate-bar.



UNITED STATES 'PATENT Queres.

VILLIAM IV. WILE, OF AUBURN, INDIANA.

GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 635,989, dated October31, 1899.

Application filed February 16, 1899, Serial No. 705 ,614. (No model.)

To LZL whom, t may concern:

Be it known that I, WILLIAM W. VWILE, a citizen of the United States,residing at Auburn, in the county of De Kalb, in the State of Indiana,have invented certain new and useful Improvements in Grate-Bars; and Ido hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the -accompanying drawings, which form part of this specification.

My invention relates to improvements in hollow grate-bars.

The object of my present invention is to provide a hollow grate-bar ofsimple and economical construction having a vertically-adj ustablehollow blast-bar, so arranged as to aord either a solid blast or thenatural draft, at the pleasure of the operator.

My invention consists of a two-part hollow blast grate-bar formed of ashell-body whose upper face is provided with a series of blastopeningsand a hollow blast-bar section adj ustably mounted adjacent to the lowerface of said shell-body and having upon its upper face a series oftWyer-openings or vertical longitudinally-apertured bosses in registerwith the said blast openings of the shell-body, means for securing saidblast-bar in position, and means for adjusting the said blast-bar intoposition for the lsolid blast or into position for the natural draft, asthe operator may desire.

The principal novel features of my invention are the vertically-adjustable hollow blastbar section and the means for making suchadjustment.

Similar reference-numerals in the accompanying drawings indicate likeparts in the several views, in which- Figure l is a longitudinal centralvertical section of my invention, showing the hollow blast-bar in itsuppermost limit of vertical adjustment and in position for theemployment of the solid blast. Fig. 2 is also a longitudinal centralvertical section of the same, showing the hollow blast-bar in its lowerlimit of ver- 5o tical adjustment and in position for the use of of theshell-body, showing the blast-openings in its upper face. Fig. 4 is atransverse section of Fig. l, showing the means for adjusting theblast-bar. Fig. 5 is a transverse section of Fig. 2.

All parts of my impro ved grate-bar are made of suitable metal and ofany desired size or proportions.

The grate-bar body, shell, or casing 1 may have its upper face eitherflat or laterally inclined from a longitudinal line midway its sides, ifdesired, though it is preferably hat, as shown, the said face beingprovided with a series of vertical blast-openings 2, resembling inoutline the frustum of a cone. The said shell-body l is provided withpendent vertical integral sides 3, whose arrangement serves to induce aproper draft about the sides and over the top of the hollow blast-barwhen desired. These sides 3, in conjunction with the transverse pendentintegral webs 4, serve to securely brace the said shell-body againstwarping in a well-understood manner. The hollow blast-bar 5, of anydesired form or contour, is adj ustably mounted adjacent to the lowerface of the said shell-body by means of the supporting-bolts 6, whichare arranged in suitable perforations midway the sides and a properdistance from the ends thereof. The blast-bar 5 is provided at each endthereof with a lug or horizontal extension 7, having suitable bolt-holesin register with the said bolt-openings in the shell-body. In theseopenings the bolts 6 are loosely arranged, the heads of which arepreferably countersunk, and the threaded ends are provided with propernuts 8. The upper surface of the said blast-bar is provided with aseries of conical upright bosses 9, preferably arranged in three or morelongitudinal rows, as shown, and adapted to register with and bereceived by the said blast-openings in the said shell-body l when thesolid blast is employed. These bosses have a longitudinal centralopening 10, communicating with the interir of said blast-bar 5, asshown. It is found that by making the said openings l0 conical in formthey tend to focus and perceptibly augment the force of the blastthrough the same. The forward end of the said blast-bar 5 is providedupon its lower face, and preferably near IOO the forward end thereof,with a pendent boss 11, having a twyer-opening 12, connected in awell-understood or other proper manner with a suitable blast. As theblast-bar 5 is loosely or slidably mounted upon the bolts G and adaptedfor a limited vertical adjustment thereon, it is entirely supported inits uppermost position by the cams 13, which are rigidly mounted on thetransverse shafts 14, which are loosely mounted in suitable bearings inthe lower end of suitable hangers 15, fixed upon the side of saidshell-body, and are arranged one near each end of said bar. One end ofthe said shaft 14 is provided with a proper crank-handle 16 foroperating the same. The blast-openings 2 of the said gratebar body areof su Iilcient diameter to afford an annular space for more or lessnatural draft about the said conical bosses 9 when the said blast-bar isin its uppermost limit of adjustment, as shown in Figs. l and 4. Asshown in Figs. 1 and 2, a proper blank space is left in the upper faceof the blast-bar, above the said twyer-openin gs, to afford amore evendistribution of the blast to the said registering openings.

The operation of my invention is, briefly stated, as follows: If theoperator desires to employ the solid blast, he so rotates the saidtransverse shafts 14 that the said cams 13 elevate the said blast-bar toits uppermost limit, as shown in Figs. 1 and 4, whereby the said apertured bosses thereof register with the said enlarged conical openings ofthe grate-body 1. lVhen the blast fills the hollow blast-bar 5, it willevenly distribute itself to the fuel through the openings in the bosses9 and the coincident blast openings 2. The natural draft at the sametime has a free circulation about the blast-bar and through the saidenlarged openings 2, therebypreventing undue heating and warping of thesame. Vhen the operator desires to employ the natural or open draftonly, he so rotates the said shafts 14 by means ot' the crank-handle 1Gas to loWer the said hollow blast-bar to the lowest limit of itsvertical adjustment, as shown in Figs. 2 and 5, thereby leaving theblast-openings 2 of the shell-body free and unobstructed and giving thenatural draft free access to the furnacefuel. Such sediment asaccumulates in the said blast -bar 5 can readily be removed through thefurnace-opening 17,of any proper construction.

Obviously my improved blast-bar is conveniently adjustable for theemployment of either the natural draft or the solid blast and canreadily be detached by removing the nut on the lower end of the bolts G.

lVhat I desire to secure by Letters Patent 1s 1. In a hollowr grate-bar,the combination of a shell-body having pendent draft-inducing sides asshown, and provided with a series of blast-openings upon itsfuel-surface; a hollow blast-bar 5 provided upon its upper surface witha series of upright bosses apertured as shown, and adapted to registerwith the said openings in the shell-body; means for suspending saidblast-bar from the extended ends of said shell-body in a position ofvertical adjustment; and means for vertically adjusting the saidblast-bar as and for the purpose described.

2. The combination of a shell-body having a series of blast-openingsupon its fuel-surface; a hollow blast-bar suspended from saidshell-body, provided upon its upper surface with a series of uprightapertured bosses in register with said blast-openings and adapted to bereceived thereby, as described; and means for vertically adjusting saidblast-bar for the purpose' of employing either the solid blast or thenatural draft, all substantially as described.

3. In a hollow grate-bar, a shell-body 1 having pendent sides and aseries of blast-openings upon its fuel-surface; a hollow blast-bar 5suspen ded as shown from the said shell-bod y by means of the bolts (3,whereby it is adapted for a limited vertical adjustment on said boltsfor the purpose specified, the said bar being provided upon its uppersurface with a series of upright bosses having conical longitudinalopenings therein, and adapted to register with the coincident openingsin the fuel-surface of said shell-body; and means for verticallyadjusting the said blast-bar consisting of pendent hangers 15 fixed asshown on the shellbody; the transverse shafts 14 rotatably mounted insaid hangers as described, and provided upon their outer end with anoperating-handle; and the cams 13 rigidly fixed upon said shafts andarranged in cooperative relation with said blast-bar for the purposespecified.

Signed by me at Auburn, in the county of De Kalb and State of Indiana,this 11th day of February, A. D. 1809.

lVILLIAM lV. VILIC.

Witnesses:

JAMES E. Rosn, JosIAH WILF..

